Delivery mechanism for envelop and similar machines.



No. 8Ro,795. PATR-NTRD MAR. a, 190s. o. H. HRYWOOD @L I). R. TRAVIS. DELIVERY MRGHANISM EUR RNVRLOP AND SIMILAR MAGHINRS.

4APPLICATION FILED APRHZ, 1906. j

me Nakms PETERS co., wAsmNcTnN. n. c.

NITED PATENT OFFICE.

CHARLES H. HEYWOOD AND DENISON E. TRAVIS, OF WAUKEGAN, ILLINOIS, ASSIGNORS TO UNITED STATES ENVELOPE CO., OF SPRINGFIELD, MASSACHUSETTS, A CORPORATION OF MAINE.

DELIVERY MECHANISM FOR ENVELOP AND SIMILAR MACHINES.

Specification of Letters Patent.

Patented March 3, 1908.

Application filed April 2 19061 Serial No. 309.239.

To all whom it may concern:

Be it known that we, CHARLES H. HEY- Woon and DENIsoN E. TRAVIS, citizens of the United States, residing at Waukegan, in the county of Lake and State of Illinois, have invented certain new and useful Improvements in Delivery Mechanism for Envelop and Similar Machines, of which the following is a specification, reference being had to the accompanying drawing, forming a part thereof.

This invention pertains and is applicable to machines of the class of those shown and described in United States Letters Patent No. 420,792, dated Februaryl, 1890, and No. 516,810, dated March 20, 1894.

The main object of the present invention is to remove envelops or bags from the folding beds of envelop or paper bag machines with certainty and rapidity.

It consists in certain novel features of construction and in the peculiar arrangement and combinations of parts as hereinafter particularly described and pointed out in the claims.

In the accompanying drawing like characters designate the same parts in both figures.

Figure 1 is a vertical cross section on the line l 1, Fig. 2, of delivery mechanism embodying the present inventori as applied to an envelop or similar machine and Fig. 2 is a vertical section in a plane at right angles to that of Fig. 1 and indicated by the line 2 2, thereon.

For the purpose of illustration only such parts of the` envelop machine as are necessary for explaining the construction and operation ofthe delivery mechanism are shown.

a, designates the folding bed, b the front folder and cthe back folder of an envelop machine mounted on the top plate d of the machine frame.

e is a horizontal shaft extending across the machine below and parallel with the folding bed a. It is provided with cams f and g and at one end with a crank 7i.

t' is a tubular rocker shaft located below and parallel with the front side of the bed a and provided with a crank arm y' and with tubular arms 7c extending upwardly therefrom through openings in the top plate d at each end of the bed c and bent inwardly and formed at their free ends with suction mouths which open towards the shaft i and are adapted to be swung therewith to and fro over the bed a. A suction pump Z whose piston is connected with and actuated by the crank h, is connected by a hose or flexible pipe m with the rocker shaft t. A connecting rod n which is forked or slotted toembrace the shaft e, is pivoted to the cr-ank arm y' and provided on one side with a roller o, which is held by a spring p in contact with the face of the cam This spring tends to swing the suction picker arms k away from the folding bed' 1l into the position indicated by dotted lines in Fig. 2A

Vertically movable lifter arms g are pivoted at their upwardly bent rear ends to standards or supports on the top plate d, adjacent to the back side of the folding bed a. At their free front ends they are bent upwardly and adapted to pass through vertical openings in said bed adjacent to its front side. Connecting rods r which are forked or slotted to lit over the shaft e and are guided thereon, are pivoted at their upper ends 1to the armsg and are provided with rollers s which are held by springs t in contact with the faces of the cams g. These springs tend to carry the arms q downwardy to positions in which their free front ends are iiush with or below the top of the bed a.

The lifter arms may be fastened on a common pivot rod or rocker shaft v and both operated by a single cam g, forked connecting rod r and spring t, thus simplifying the construction of the machine without affecting its operation.

The delivery mechanism hereinbefore described operates as follows: A11 envelop u having been folded on the bed a, the picker arms 7c are swung backward by the cam f over the envelop on the bed, as shown by full lines in Fig. 2, and dwell for an instant in this position. The front folder b opens and the arms g lifted by the cams g, following the opening of the back folder, thereuponraise or tip the front side of the envelop from the bed a against the opposing mouths of the picker arms into position to be caught and carried thereby over the front folder b, which projects above the top of the bed. At the same time the plunger of pump Z being drawn upward by the crank h, exhausts air from the shaft i and picker arms, producing therein a partial vacuum,

y versal of the pump plunger when or just which sucks and holds the envelop against l the free ends of the picker arms. The roller 0 then passes off from the high part of the cam f and the spring p quickly turns said arms forward carrying the envelop with them. An instant before the picker arms start forward the rollers s leave they high parts of the cams g, and the springs t draw the lifter armsq down into their normal positions below the top of the bed a. The rebefore the picker arms reach their forward position indicated by dotted lines in Fig. 2, destroys the vacuum therein and releases the envelop, which is positively disengaged therefrom and discharged by the continued downward movement of the plunger.

The operations above stated being performed in quick succession, envelops or the like are removed from the bed a promptly and with certainty immediately upon the opening of the folders.

Various changes in the details of construction and arrangement of parts may be made without departing from the Iprinciple and intended scope of the invention.

We claim:

1. In combination with the folding bed of an envelop or similar machine, a suction picker movable to and fro over the folding bed, means for producing a vacuum in said picker while it is over and moves away from said bed, and a lifter adapted to raise an envelop or the like upwardly from the bed against the picker, substantially as de scribed.

2. In an envelop or similar machine, the combination with the folding mechanism comprising a bed and front folder, of a suction picker movable to' and fro over said bed, means for exhausting air from the picker while it is over and moves away from the bed, and a vertically movable lifter adapted to raise an envelop or the like from the bed into position to be caught by the picker and to be carried thereby over the front folder, substantially as described.

3. In an envelop or similar machine the y combination with the folding bed, of a suction picker consisting of a tubular rocker shaft provided with tubular arms having mouths at their free ends which are bent to pass over said bed, means for exhausting air from said picker, and a lifter consisting of arms movable vertically through openings in the bed and adapted to raise an envelop or the like therefrom towards the opposing mouths of the picker, substantially as described.

4. In an envelop or similar machine the combination with folding mechanism comprising a bed and folder, of a suction picker comprising a tubular rocker shaft provided with inwardly bent tubular arms terminating in mouths opening towards said shaft and a suction pump connected with said shaft; a lifter comprising pivoted arms movable at their free endsupwardly through openings in said bed, and means for actuating the picker, pump and lifter, substantially as described.

5. In an envelop or similar machine, the combination with a folding bed, of a withdrawing mechanism for removing a folded envelop or the like from the folding bed and comprising a pair of suction pickers, means for swinging said pickers in planes at the opposite ends of said folding bed, said pickers being bent at their ends to extend over said folding bed, and means for lifting an envelop or the like from said bed into contact with said pickers, substantially as described. v

6. In an envelop or similar machine, the combination with a folding bed and mechanism for folding an envelop or the like thereon, of a withdrawing mechanism comprising the following instrumentalities operating in the order named, a suction picker, means for moving said picker over the folding bed, means for raising the envelop into contact with said picker, means for producing a vacuum in said picker, and means for reversing the movement of said picker, substantially as described.

In witness whereof we hereto affix our signatures in presence of two witnesses.

CHARLES H. HEYWOOD. DENISON E. TRAVIS. Witnesses:

A. M. BEAMAN, RUSSELL W. LEwis. 

